Coil retaining arrangement



y 1966 R. B. DAY 3,249,779

COIL RETAINING ARRANGEMENT Filed Sept. 17L 1962 m 7 15. 4. WZT ZNEYUnited States Patent Office I 3,249,779 Patented May 3, 1966 3,249,779COIL RETAINING ARRANGEMENT Russell B. Day, Longmeadow, Mass, assignor'toR. E. Phelon Company, Inc., a corporation of Massachusetts Filed Sept.17, 1962, Ser. No. 223,981 1 Claim. (Cl. 310-153) This invention relatesto new and improved fastening means for use in securing and maintaininga coil in operative position such as upon the core structure of amagneto.

An object of the invention is to provide a new and improved fasteningdevice of the type set forth which is both simple and economical inconstruction as well as simple and eflicient in operation.

Another object of the invention is to provide a new and improvedfastening means of the type set forth which is external from the corestructure of the device and which, thus, does not limit the amount ofiron in that portion of the core structure passing through the center ofthe coil and, thus, which does not detract from the efiiciency of thecore.

Another object of the invention is to provide a new and improved deviceof the type set forth which prevents vibratory motion of the coil eitheraxially or angularly about its center.

Another object of the present invention is to provide a new and improvedfastening device of the type set forth which is simple and economical inassembly upon the coil and core structure which it maintains in relativepositions.

Other objects and advantages of the invention will'be apparent from thefollowing description taken in connec- Although the invention has beenshown as applied to a magneto of the flywheel type, such is for purposesof illustration only as the invention will operate equally well on Themagneto stator shown also includes the breaker plate 13 having thebreaker points 14 mounted thereupon in the conventional manner.

A condenser 15 is likewise mounted upon said breaker plate 13 in theusual manner.

In the invention the said magneto is provided with a pivotally mountedspring clip or fastening member 16 for retaining the coil 12 inoperative position on the core structure 10. Said spring clip 16, in theillustrated embodiment of the invention is pivotally connected at oneend 16a to the core structure 10 of the magneto through the opening 10ain said core structure 10. Said end 16a could equally well in thepresent invention, however, be connected to the breaker plate 13 orother part of the magneto or device.

Said spring clip 16 has been designed to be of such a shape that, afterthe end 16a of said spring clip 16 has been located in said opening 10ain said core structure 10, the free end of said spring clip 16 includesthe hook 1611 which rests in the recessed portion of the projection 17aof the coil housing 17 between the body of the coil and raised portion17b. Through this engagement with the coil housing 17, the spring clip16 holds the coil 12 firmly in operative position upon the portion 11 ofthe core structure 10. This unique shape of the spring clip 16 is illustrated in FIGS. 5 and 6.

magnetos and other devices of other types where a coil is employed.

Referring to the drawings:

FIG. 1 is a plan view of a device embodying the invention; 7

FIG. 2 is a side view of the device shown in FIG. 1;

FIG. 3 is a plan view of the device embodying the invention shown inFIG. 1 taken on the side opposite to that shown in FIG. 1;

FIG. 4 is a top view of the device shown embodying the invention;

FIG. 5 is an end view of the form of invention shown; and

FIG. 6 is a side of the form of invention illustrated.

Referring more particularly to the drawings wherein similar referencecharacters designate corresponding parts throughout the several views,the device shown embodying the invention comprises a magneto statorincluding a laminated iron core structure 10, said core structureincluding an opening 10a in one of its arms and having a portion 11adapted to carry a coil 12 which may be in a cover or housing 17 or thecoil may be potted without casing or housing and said coil 12 includinga cut-away portion 12a in its center of such dimensions that saidportion 11 of the core structure 10 can fit therein with a relativelyclose fit and with a minimum amount of gap being left between saidportion 11 of said core structure 10 and said cut-away portion 12a ofsaid coil 12. This prevents play between the parts.

The coil 12 is enclosed within the coil cover or housing 17. Said coilhousing 17 includes a projection 17a; said projection 17a has a raisedportion 17b.

The aforementioned positioning of the means for securing the coil 12 tothe portion 11 of the core structure 10 external to said portion 11permits gaid portion 11 to be made 'without any opening; therebyproviding as much iron in the core structure as possible. Thus, thefastening means provided by the present invention does not reduce theamount of iron in the core portion passing through the coil and does notdetract from the eificiency of the core.

Furthermore, the fastening means provided by the present inventionthrough its aforedescribed manner of construction and attachment to thecoil housing 17 prevents vibratory motion of the coil, either axially orangularly about its center.

Thus, it will be seen that I have provided new and improved means foraccomplishing all of the objects and advantages of the invention.

1 claim:

A stator assembly for a flywheel magneto having a magnetic corecomprised of three legs disposed in the form of an E, a coil enclosed ina core housing which encircles the middle leg of the core, said coilhousing being secured on the core by means of a pivotally mounted clip,said clip having one end mounted in one of the outer legs of said coreand the opposite end engaging said housing which has a projection toretain said opposite end of the clip.

References Cited by the Examiner UNITED STATES PATENTS 1,512,693 10/1924Ieullard 310-260 2,243,416 5/1941 Crocker 310-70 2,575,115 11/1951 Linke310-194 2,811,658 10/1957 Brainard 310-258 X 2,872,599 2/1959 De Young310-21 3,144,572 8/1964 Smader 310-71 3,145,315 8/ 1965 Henschke 310-70MILTON 0'. HIRSHFIELD, Primary Examiner. ORIS L. RADER, Examiner. P. L.MCBRIDE, J. I. SWARTZ, Assistant Examiners,

